crank seals wtf

[DezKnotz]

my friend has a 701 that he just had the crank seal redone on and they have less than a tank or two of gas on them and he blew them out again. what could his problem be?:Thinkingof_:

 

[Matt_E]

They might have been installed wrong (backwards, for example).

 

[HBCwatercraft]

Were the put in right and not backywards? Tits face out on the coupler seal. Use yamabond on them aswell and grease the inners.

 

[waterfreak]

the Yamaha book says to keep the outside of the seals dry and use grease on the center.

BTW, did you install a rebuild crank recently? I have seen the rear circlip on the rear bearing, be too big and not allow the cases to close properly and blow the rear seals.

 

[Kennay]

the Yamaha book says to keep the outside of the seals dry and use grease on the center.

BTW, did you install a rebuild crank recently? I have seen the rear circlip on the rear bearing, be too big and not allow the cases to close properly and blow the rear seals.

Had to deal with that last weekend. It would fit, but it was really hard to get the dowel lined up to push the bearing down into the slot. Took some patience but we eventually got it to go.

 

[DezKnotz]

he got the motor off ebay blew the seal in one ride, had them redone and the same thing happend, could the crank be bad?

 

[ADDict]

Is he blowing both rear seals, or just the outside one? If it's just the outer one, they've probably been installed backwards.

 

[SUPERTUNE]

Are they using OEM seals?
Aftermarket seals are junk for any high performance application.

 

[Kennay]

Mine were

 

[steve-uk]

had the same issues...

no1 make sure its the right seal
no2 make sure its fitted the right way around